Clinically, the stage of chronic renal failure is not the same, the treatment mode is also a certain difference, so the focus of the treatment is focused on the patients with chronic renal failure should be clear about the stage of the disease, the correct use of a certain way of treatment, do not delay the best period of treatment of the disease, in addition to diet and other perspectives need to cooperate with the treatment. In the polyuria stage of chronic renal failure, glomerular filtration decreases, blood creatinine level increases, and blood urea nitrogen level also increases to a certain extent, and the patient feels tiredness, loss of appetite, increase in nocturia, and symptoms of mild anemia. For patients with chronic renal failure diet should first eat high quality protein, it is best to eat high quality animal protein, can not eat plant protein, because plant protein will cause the increase of post metabolic products, affecting the function of the kidneys. Dietary care for patients with chronic renal failure also needs to ensure a certain amount of calories, because of the restriction of protein intake, for this reason, it is necessary to supplement a variety of calories, such as low-protein starch and sugar, to increase the consumption of the body’s needs. Although patients with chronic renal failure will have symptoms of polyuria, they will also be accompanied by the emergence of edema, which is due to varying degrees of kidney failure, resulting in a small amount of water in the body, increasing the burden on the heart and lungs, and for this reason, you can not drink too much water, which will also increase the burden on the kidneys. The last thing that patients with chronic renal failure should do is to pay attention to the control of salt and prevent the emergence of high blood pressure. Beware of excessive potassium ions to avoid patients from developing hyperkalemia. Maintain the balance of calcium and phosphorus to prevent complications. Above for chronic renal failure polyuria will appear in the symptoms, as well as the disease how to eat a simple summary, for the patients themselves need to cooperate with the treatment, itself chronic renal failure is a chronic treatment process, if the patient is in a hurry, then for the recovery of the disease as well as their own health is not good.